MarkWest Pioneer, L.L.C.

Original Volume No. 1

Effective Date: 07/14/2009, Docket: RP09-367-001, Status: Effective

First Revised Sheet No. 17 First Revised Sheet No. 17

Superseding: Original Sheet No. 17

RATE SCHEDULE FT-2

(Continued)

2.7 If Shipper has elected Option 2, Shipper’s MDQ shall be subject to the following

provision, commencing the later of January 1, 2010 or the first calendar quarter of

Shipper’s service: A failure by Shipper to utilize its service may result in a downward

adjustment to Shipper’s MDQ, if the daily average volume for Shipper’s account during any

calendar quarter is less than seventy-five percent (75%) of Shipper’s then current MDQ

times the number of days in the quarter. If such shortfall exists, then Transporter

shall have the right but not the obligation to adjust Shipper’s MDQ downward, by written

notice to Shipper, to no less than an amount equal to ninety percent (90%) of Shipper’s

then current MDQ. Transporter’s notice shall be furnished within fifteen (15) days after

the close of such period and any adjustment under this section shall be effective on the

first day of the month following Transporter’s notice.

2.8 If Shipper has elected Option 2, commencing the later of January 1, 2010 or the first

calendar quarter of Shipper’s service, if during the prior three (3) Month period the

daily average volume of Shipper’s gas transported on the Arkoma Connector Pipeline is

greater than one hundred ten percent (110%) of the then current MDQ for firm

transportation, Transporter, on written notice to Shipper, shall have the right but not

the obligation to adjust the MDQ upward to no more than an amount equal to one hundred

ten percent (110%) of the then current MDQ, provided that Transporter has capacity

available to accommodate such increase. Transporter’s notice shall be furnished within

fifteen (15) Days after the close of such period, and any adjustment under this provision

shall be effective on the first day of the month following Shipper’s notice.

2.9 Transporter shall have no obligation to accept any Gas for transportation under this Rate

Schedule FT-2 other than Gas subject to Shipper’s Production Commitment Agreement.

2.10 Transporter shall have no obligation to receive Gas at the Receipt Point(s) or deliver

Gas at the Delivery Point(s) if the Shipper has failed to make and properly implement all

necessary arrangements on upstream and downstream systems.